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User Manual 52/374

High Level Hardware Access

Get local information

It is possible to read out the local settings of the eth0 device, such as MAC address, IP address, Gateway,

Netmask,....

# ifconfig eth0

eth0 Link encap:Ethernet HWaddr 00:1D:48:20:F6:11

inet addr:172.25.230.17 Bcast:172.25.230.255 Mask:255.255.255.0

UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1

RX packets:3819 errors:0 dropped:0 overruns:0 frame:0

TX packets:295 errors:0 dropped:0 overruns:0 carrier:0

collisions:0 txqueuelen:1000

RX bytes:507786 (495.8 KiB) TX bytes:23816 (23.2 KiB)

Interrupt:133 Base address:0x3000

How to set static IP for eth0

1. Set the IP settings to "STATIC" in /etc/init.d/rc.conf

# -------------- NETWORK ETH0:

# DHCP settings for eth0

# if ETH0_CONF is set to "DHCP" then DHCP will be used

# in case we do not get any DHCP configuration from a DHCP server, we will automatically

# fall back to mode "STATIC".

# if ETH0_CONF is set to "STATIC" then the static settings below will be used

# if ETH0_CONF is set to "UBOOT" then the settings will not be touched

# Note: also adapt the setting in /sbin/dhclient for the gateway entries

export ETH0_CONF="STATIC"

# Static settings for eth0 (if ETH0_CONF="STATIC")

# Note: ETH0_GW is also important if you use ETH0_CONF="UBOOT"

# IP of eth0 if ETH0_CONF="STATIC"

export ETH0_IP="192.168.200.1"

# Submask of eth0 if ETH0_CONF="STATIC"

export ETH0_SUBMASK="255.255.255.0"

# Broadcast IP of eth0 if ETH0_CONF="STATIC"

export ETH0_BR="192.168.200.255"

# Settings for eth0 (if ETH0_CONF="STATIC" or "UBOOT")

# Gateway of eth0

export ETH0_GW="192.168.200.1"

# Domain of eth0

export ETH0_DOMAIN=""

# DNS which eth0 uses for communication

export ETH0_DNS="192.168.1.8"

2. Reboot the system:

# reboot

Example: C-Code

# How to TCP connection via sockets

#include <stdio.h>

#include <unistd.h>

#include <string.h>

#include <sys/types.h>

#include <sys/socket.h>

#include <netinet/in.h>

#include <arpa/inet.h>

sint16 s16_Return;

sint16 s16_Sockfd = socket(AF_INET, SOCK_STREAM, 0); // Create socket

Brand	STW
Model	TC1
Category	Controller
Language	English

STW TC1 User Manual

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STW TC1 Specifications